"A QR code is a two dimentional barcode that mobile devices and smartphones can read using readily available barcode reader application."
"QR codes have the ability to connect the real world with the digital information highway".

QR Code Anatomy

qr markerA two dimentional barcode with the ability to be read irrespective of X or Y axis orientation.

QR construction elements

QR Code Anatomy

QR Code Position Marker
Position marker symbol
QR Code Alignment Marker
Alignment marker symbol
QR Code Timing Markers
Timing tracking
QR Code Format Data
Format data
QR Code Position Marker
Version data
QR Code Data Area
Data Area
QR Code Quiet
Quiet zone

Static QR Codes

qr markerStatic QR codes have everything they need to function inside then.

Static Direct QR Code

Provided the QR code scanner application supports all the functions that QR codes could request, the direct QR code is the most efficient way of getting specific instructions to the scanning device.

Advantages

  • No network required
  • Diverse range of instructions for diverse smartphones

Disadvantages

  • Best suited for only simple instructions
  • Big data (vCard) = Big QR codes

Dynamic QR Codes

qr markerDynamic QR codes are pointers to online data sources.

Dynamic QR Code

Dynamic QR codes cointain a pointer, typically a URL, to a resource on a remote public network.

Advantages

  • Rich content ability (audio, video, ....)

Disadvantages

  • No network access = Cannot function.
    (HTML5 Manifest apps can be an exception)

Services & Software

markerVarious forms of free and charged QR code generators are available online via Internet.

Display media
Almost all free online QR code generators provide low resolution bitmap QR codes, suitable for diplaying on a monitor or TV screen, supporting the RGB (Red/Green/Blue) color model.

Examples of free QR Code Generators

Print media
To ensure the quality of the QR code remains high, irrespective of the size it is printed at, vector or line drawing QR codes are the best way to go. Very few free online services provide vector EPS and/or PDF QR code files. Those that do like delivr.com and qrcode.littleidiot.be and www.qrcode.cx and (too) many more create these vector QR codes using the RGB model, not supported by the printing industry.

Besides the CMYK Vector QR codes generated by QR4, two other providers of online QR codes do supply print friendly QR codes, these are keremerkan.net and http://qr-codegenerator.nl/

QR Code examples

Examples of the diverse uses of QR codes. Scan the QR codes below to discover the wide range of abilities of QRcodes to connect printed and displayed barcodes to resources of the mobile device and the Internet.

QR Code Map

QR Code Map

QR Code Email

QR Code Email

QR Code Website

QR Code Website

QR Code Video

QR Code Video

QR Code Dial

QR Code Dial

QR Code Navigation

QR Code Navigation

Comprehensive list of QR Code generators

A wide selection of comprehensive QR Code generator (most of which are free) you can use to create your own QR codes.